In a machining operation that approximates orthogonal cutting, the cutting tool has a rake angle 8°. the chip thickness before the cut to= 0.15 mm and the chip thickness after the cut tc=0.3375 mm. calculate: a) the shear plane angle and the shear strain in the operation b) the shear strength of the work material assuming the cutting and thrust force were measured to be fc = 679.5 n and ft=535.5n. the width of the orthogonal cutting operation is w= 2.5 mm. c) the friction and the coefficient angle d) the cutting power and specific energy in the machining if the cutting speed 60 mm/min

The temperature of air decreases as it is compressed by an adiabatic compressor. a)- true b)- false

An engine runs on the ideal diesel cycle. the cycle has a compression ratio of 20 and a cutoff ratio of 2. the highest temperature in the cycle is 1200 k. if the heat into the system is 300 kj/kg of working fluid and using variable specific heats determine the work produced per mass of working fluid

Along 8-cm diameter steam pipe whose external surface temperature is 900c connects two buildings. the pipe is exposed to ambient air at 70c with a wind speed of 50 km/hr blowing across the pipe. determine the heat loss from the pipe per unit length. (b) air at 500c enters a section of a rectangular duct (15 cm x 20 cm) at an average velocity of 7 m/s. if the walls of the duct are maintained at 100c. a) the length of the tube for an exit temperature of the air to be 40 0c. b)the rate of heat transfer from the air. c) the fan power needed to overcome the pressure drop in this section of the duct.